CVE-2026-0990
This uncontrolled recursion vulnerability occurs in the xmlCatalogXMLResolveURI function when an XML catalog contains a delegate URI entry that references itself.
Does this matter?
Lower severity and a low EPSS score (0.90%). Track it; it rarely justifies an emergency change on its own.
Description
A flaw was found in libxml2, an XML parsing library. This uncontrolled recursion vulnerability occurs in the xmlCatalogXMLResolveURI function when an XML catalog contains a delegate URI entry that references itself. A remote attacker could exploit this configuration-dependent issue by providing a specially crafted XML catalog, leading to infinite recursion and call stack exhaustion. This ultimately results in a segmentation fault, causing a Denial of Service (DoS) by crashing affected applications.
- CVSS 3.1
- 5.9 MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.90% probability · 58th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-674
- Affected
- redhat/hardened images · redhat/jboss core services · redhat/openshift container platform · redhat/enterprise linux · ibm/vios · ibm/aix · xmlsoft/libxml2
- Source
- secalert@redhat.com
References
- https://access.redhat.com/errata/RHSA-2026:7519Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2026-0990Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2429959Issue Tracking, Third Party Advisory
- https://gitlab.gnome.org/GNOME/libxml2/-/issues/1018Exploit, Issue Tracking, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.